2

#include<stdio.h>
int main()
{
    int i,n,count,sum;
    int a[10];
    scanf("%d",&n);
    while(n!=0){
        count=0;
        i=0;
        do{
            a[i]=n%8;
            n=n/8;
            i++;
            count++;
        } while(n/8>=8);
        a[i+1]=n;
        sum=0;
        for(i=count+1;i>0;i--){
            sum=sum*10+a[i];
        }
        printf("%d\n",sum);
        scanf("%d",&n);
    }
    return 0;
}